easy, in your Профиль under your Обои there is an uption in blue that says "upload photos" click in that and then Загрузить the фото Ты want! down it says: "make this imagen my icon" или something like that, click in the little square and then click in "submit imagen" and tadah! Ты have that as an Иконка ;)
Very easy!Just click Загрузить pictures on your profile. Then, look for the name of your icon. Then, check the box that say "make this picture my Профиль picture".Then, cick "upload picture". Then, wait for it upload. Then TADA! There it is!